Avi K,
“Avram, why speak a useless, moribund language?”
It’s not moribund – it’s still spoken by many Jews. And it’s not useless – a lot of Torah learning still occurs in Yiddish or using Yiddish phrases, proved above by your complaints.
“which is an important world language.”
Yiddish is an important Jewish language.
“As for kneidlach, I only eat them on Pesach.”
Look who just used a Yiddish word!